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Potassium manganate (K2MnO4) is formed w...

Potassium manganate `(K_2MnO_4)` is formed when

A

Chlorine is passed through aqueous `KMnO_4` solution

B

Magnanese dioxide is fused with potassium hydroxide in air

C

Formaldehyde reacts with potassium

D

Potassium permaganate reacts with `H_2SO_4`

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The correct Answer is:
b,c
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Postassium permanganate is manufactured a large scale by fusing - with KOH and KNO_(3) to form K_(2)MnO_(4) , which is than electrolytically oxidized in an alkaline medium.

Given below are two statements : Statement I : Potassium permanganate on heating at 500K forms potassium manganate. Statement II : Both potasium permanganate and potassium manganate are tetrahedral and paramaganetic in nature. In the light of the above statement, choose the most appropriate answer from the options given below :

CENGAGE CHEMISTRY-D AND F BLOCK ELEMENTS-Exercises Multiple Correct
  1. Which is true statement about KmnO4?

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  2. Out of [Fe(CN)6]^(4-),[Ni(CN)4]^(2-), and [Ni(CO)4]: select the incorr...

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  3. The ability of d-block elements to form complexes is due to:

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  4. Which one of the following ionic species will not impart colour to an ...

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  5. A transition element X has a configuration 3d^4 in its +3 oxidation st...

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  6. The transition metals which do not form amalgams are

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  7. The colour of the transition metal ions is due to

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  8. Transition elements have greater tendency to form complexes because

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  9. Which out of the following belong to 3d-series?

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  10. The elements which exist in the liquid state at rooom temperature are.

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  11. Which of the following statements (s) is (are) correct with reference ...

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  12. Which of the following represents the correct order of the properties ...

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  13. The correct statement for d-block element is

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  14. The aqueous solution of the salt will be coloured in the case of

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  15. Potassium manganate (K2MnO4) is formed when

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  16. Cl2 gas is obtained by various reactions select the reactions from the...

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  17. Which is /are true statement?

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  18. In [Fe(CN)5(NO)]^(2-), Fe has +2 state. It cannot be dicided by

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  19. Which one of the following statement is/are correct?

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  20. In the iodometric estimation in the laboratory which process is involv...

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